Live updates

Knowing Grant as I do, I find it completely unbelievable that he would do such a thing.

I have to say I think this is all about the Labour Party trying to detract from the point we have been making about the deal that they would have to do with the SNP, which is going to cost people in this country a lot of money and is not something I think that we want to see - it would result in more debt, more borrowing, higher taxes.

This is all about detracting from that story and I'm afraid I think it's a smear tactic that won't work. This is not something that Grant would do.

Taking questions after a speech in Bedford, Mr Cameron was asked whether he had "full confidence" in his chairman, and replied: "Grant does a great job. He has made a very clear statement about this and I have got nothing to add to that."

Speaking as one of the guests on The Agenda with Tom Bradby Mr Shapps said it was still important for MPs to be on Twitter: "Politicians can either hide away or they can be out there. It's not just tweeting - it's about replying to people who tweet to you."